Hi  @Clive_A 

Thanks, "All" is selected in that field,

i have also attached a small diagram to better describe the issue

hope this is achievable 

Hi  @Clive_A ,

yes i'm certain that the tunnel is up, and communication is possible in one direction thanks to this, but it does not go the reverse way, from the server network to the client network.

is there any special configuration that needs to be done to achieve site-to-site via openvpn? Iv'e found a ton of guides on their own forums but they all seem to apply to windows or linux based servers, where i can access the server config files, with omada this is not the case sadly.